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2 SheetsSheet 1.

H. A. LUGRIN (No Model.)

STOP WATOH.

Patented Dec. 7,1886.

"Illllllu ATTORNEYS.

K ZZZ)? %M6/ (No Model.) 2 Sheets-Sheet 2. H. A. LUGRIN.

STOP WATGH. .No. 358,795. ligtenged Dec. 74, 1886.

By 7 ATTORNEYS.

N. PETERS PlIMo-Lnhogmphen Washington. DC.

* UNITED STATES PATENT OFFICE.

HENRY A. LUGRIN, OF NEW YORK, N. Y.

STOP-WATCH.

SPECIFICATION forming part of Letters Patent No. 353,795, dated December '7, 1886.

Q Application filed March 12, 1886. Serial No. 194,963. (No model.)

To all whom it may concern.-

Be it known that I, HENRY A. LUGRIN, of the city, county, and State of New York, have invented certain new and useful Improvements in Stop-WVatches, of which the following is a specification.

This invention relates to certain improve ments in the stop-watch for which Letters Patent were granted to me heretofore, No. 243,143, dated June 21, 1881, said improvements being designed with a view to facilitate the working of the quarter-second hand and split quartersecond hand and of the auxiliary minute-hand; andtheinvention consists, essentially, of mechu anism whereby the oscillatory arbor of the quarter-second hand is guided in an accurate and reliable manner and thrown into gear with the motion-transmitting gear of the watchmovement.

The invention consists, further, of an intermediate motion-transniittingpinion between the gear-wheels of the driving-arbor and the oscillating arbor of the quarter-second hand, said pinion being supported on an oscillating and laterally-adjustable bridge.

The invention consists, next, of an improved brake by which the split quarter-second hand is stopped in a more effective manner.

The invention consists, finally, of an auxiliary minute-hand applied to an oscillatory arbor and means by which said arbor is guided and thrown into mesh with suitable transmittinggearing actuated by the center wheel of the watch-movement.

In the accompanying drawings, Figure 1 representsa front elevation of myimproved stopwatch. Fig. 2 is a plan viewoi" the top of the movement. Fig. 3 isa detailvertical transverse section through the hollow arbors of the minute and quarter-second hands, showing the mechanism for guiding the arbor of the quarter-second hand and the brake for stopping the split quartersecond hand on line a a", Fig.

2. Fig. 4 isa vertical transverse section on line 3 y, Fig. 2, of the mechanism for actuating the auxiliary minute-hand, drawn on a larger scale. Fig. 5 is a vertical transverse Similar letters of reference indicate corresponding parts.

In the drawings, A represents the arbor of the quarter-second hand A, which arbor is passed through the hollow arbor B of the minute-hand B. The arbor A of the quarter-second hand A is also made hollow, for admitting the passage of the arbor O of the split quarter-second hand 0. The hollow arbor A of the quarter-second handA rests by means of a shoulder, b, on a face shoulder or bearing, 1), of the hollow arbor B of the minute-hand, so as to be capable of a slight oscillating {U0- tion on this support. The arbor A of the quarter-second hand carries at its opposite endthat is to say, at the top of the movement-a gear-wheel, D, which gear-wheel is provided with minute-teeth and adapted to be thrown into mesh with an intermediate pinion, D, which receives motion from a minutely-toothed gear-wheel, D", that is keyed to the arbor of the fourth wheel of the watchmovement, as shown in Fig. 2. The oscillating end of the arbor A passes through an opening, 6, of the top bridge, E, which opening is large enough to permit the free motion of the arbor A, so that its gear-wheel D is thrown in mesh with the intermediate transmitting-pinion, D. 1

Immediately above the opening eis arranged on thetop bridge, E, a recessed guide, 6, which is attached by a screw, e to the top bridge, E, said screw passing through a slot of the guide 0', so that the same has a certain play on the shank of said set-screw for adjusting the guide 6, as shown in Figs. 8 and 6. The exact adjustment of the recessed guide 6 is accomplished by an eccentric, e, which turns on a pivot, 62*, and acts on the straight rear edge of the guide 6. By loosening the set-screw e of the guide 0 and turning the eccentric e in one or the other direction on its pivot e, the guide 0 can be moved forward or back, so as to control the oscillating motion of the arbor A. The adjustable guide 6 serves for guiding the arbor of the quarter-second hand, as well as for determining accurately the extent of its oscillating motion, so as to prevent any lost motion or slack of the same when throwing it in or out of gear with the motion-transmitting mechanism. The intermediate transmittingpinion, D, is also cut with minute-teeth, and supported loosely on anarbor, j, that is attached to one end of a laterally-oscillating bridge D which is applied by a pivot, f, at its opposite end to the centrally perforated set-screw, f, as shown in Fig. 5. The setscrew f screws into a sleeve, f which is guided by its neck in a recess, E, of the top bridge, E, as shown in Figs. 2 and 5. The set-screwy" and sleeve f serve to adjust the bridge D forward or back ward in the recess E, so as to produce thereby the exact relative position of the transmitting-pinion Dto the gearwheels D D. The upper rounded'off end of the pivotf of the loose bridge D bears against the under side of the top bridge, E, so as to move freely thereon, while the bottom of the loose bridge D moves 011 the top plate of the movement, it being retained in position between the sleevef ol'the top plate and the top bridge, E. As the supporting-bridge D of the pinion D is loosely connected with the set-screw f and as the pinion Dturns loosely on the pivot for the oscillating bridge D, the pinion D adjusts itself readily to the positions of the gear-wheels D D and transmits the motion of the gear-wheel D' to the gear-wheel D, even it said gearwheels should not be out quite accurately true. In my former construction of stop-watch, shown in the Patent No. 243,143 of June 21, 1881, any inaccuracies in the shape or cut of the gear-w heels D D resulted in the stopping of the quartersecond hand, owing to the wedging in of the transmitting-pinion between said geai wheels. The free play thus given to the pinion D by the loose bridge facilitates the intermeshing with the gear-wheels l) D, and consequently the reliable transmission of motion to the arbor A of the quartersecond hand when the same is thrown into gear with the pinion D. The support of the pinion on the freely-moving bridge also facilitates in a high degree the primary adjustment of the transmitting mechanism, as well as the readjustment of the same when the watch has been cleaned or repaired.

The arbor A of the quarter-second hand is provided with the usual stop-disk and hearteam, (shown in Fig. 3.) that are actuated, respectively, by stop and return levers,which are actuated by a double ratchet-wheel, G, in the usual well-known manner in stop-watches, as shown in Fig. 2. A spring, a, presses the arbor A in the direction of the intermediate pinion, D, so that as soon as the stop-lever is released the gear-wheel D isthrown in mesh with the pinion D, and thereby the quartersecond hand set in motion. \Vhen the quartersee- 0nd hand A is to be stopped,the stop-lever is applied to the stop-disk, which moves the arbor A sidewise againstthe tension of the spring (6,11l1d interrupts thereby the intermeshing of the pinion D and gear-wheel D.

As the mechanisms employed for starting, stopping, and returning the quarter-second hand are well known, they require no further description.

The split quartersecond hand 0 is also actuated by mechanism located at the top of the movement, said mechanism consisting of a disk, g, on the arbor O of the split quartersecond hand, which disk is engaged at its circumference by a friction brak e, 9', that is guided in ways of a yoke-shaped guidepieee, 9 attaehed by a center screw, 9 to the top bridge, E. The shank of the friction-brake g is recessed at a point intermediately between the uprights of the guide-piece g', and engaged by a spring, g, which spring serves to press the brake 5 against the circumference of the stopdisk The end of the spring is engaged by a spring-actuated lever, 9 which lever is operated by a double ratchet-wheel, g", as customary in stop-watches. hen the lever g releases the spring 9, the friction-brake g is applied to the stop-disk g and the "split stopped,while the quarter-second hand continues its motion. When the lever g engages the spring g, the same is moved sidewise, and thereby the brake 9 released from the disk of the arbor of the split quarter-second hand, as shown in Fig.3. The split quarter-second hand flies then instantly back to the quarter-second hand by the usual tension device applied to the stop-disk g, and is returned with thesame to the starting-point. The guide-piece g is adjusted accurately in line with the arbor of the quarter-second hand by means of the center screw, 9 which acts as a pivot for the guide-piece y, and is rigidly clamped by the screw 9 The friction-brake y can thus be accurately adjusted in line with the arbor of the quartersecond hand and the recess of the guide a, or, in other words, in line with the direction of oscillating motion of the arbor A. The brake 9 follows, when applied to the disk for stopping the split by the action of its spring, the oscillating movements of the arbors ot' the quarter and split quarter second hands, and adjusts itself to the relative position of the disk g when the quarter-second hand is stopped.

An auxiliary minute-hand, F, applied to an arbor, F, moves over an auxiliary dial, which is arranged symmetrically to the dial of the second-hand on the watch-dial. The auxiliary minute-hand F is operated by transmittinggearing from the center wheel of the watch-movement, its arbor being supported by a collar, 72, on the bearing of a plate, h, attached to the bottom plate of the watch movement, as shown in Fig. 4. The opposite end of the arbor F of the minutehand F passes through an opening in the top bridge, E, and is guided by areccsscd guide, If, in the same manner as the arbor of thequa-rter second hand, said guide being adjusted by a pivoted eccentric, 7L3, as shown in Figs. 4 and 6.

The arbor F is adapted to be oscillated on its bearing h by the action of a spring, i, which bears on one side of the same, and the action of a stop-lever, i, that is actuated by the double ratchet-wheel G. (Shown in Figs. 2 and a.) A minutely-toothed gear-wheel, i on the arbor F is thrown into mesh with a transmitting gear-wheel, i, keyed to an intermediate arbor, F said gear-wheel i being also minutely toothed. The intermediate IIO arbor, F is supported in bearings of the bottom plate of the movement; and of the top bridge, E, and receives continuous rotary motion by a pinion, i from the center wheel, i as shown in Fig. 4. When the stop-lever t" is released from the stop-disk, i, the arbor F is oscillated by the action of the spring t, whereby the gear-wheel is thrown into mesh with the transmitting gear-wheel i, and thereby motion imparted to the auxiliary minute-hand. This is. accomplished simultaneously with the starting of the quartersecond hand, as both are operated by the same double ratchetwheel, G. The stopping, of the minute-hand is also accomplished by the action of the stop-lever i and stop-disk t simultaneously with the stopping of the quarter-second hand, while it is returned to the starting-point by a lever, i heart cam t, and double ratchet wheel G simultaneously with the quarter-second hand. The oscillating movement imparted to the arbor of the auxiliary minute hand by the action of the spring and stop-lever, and the guiding of said arbor by the recessed adjustable guide, secure the quick and reliable throwing in or out of gear of the arbor of the auxiliary minute-hand with the motiontransmitting mechanism of the watch-movement, and produce the starting, stopping, and returning of the minutehand simultaneously with and on the same principle as the quarter-second hand of the timing attachment.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a stop-watch, the combination of the oscillating and guided arbor of the quartersecond hand, a gear-wheel on said arbor, an intermediate transmitting-pinion supported on an oscillating bridge, and a gear-wheel on the arbor of the fourth wheel of the movement, substantially as set forth.

2. In a stop-watch, the combination of the oscillating arbor of the quarter-second hand, a gear-wheel on said arbor, a transmittingpinion, a laterally-oscillating bridge supporting said pinion, means to adjust said bridge in a recess of the top bridge of the movement, and a gear-wheel on the arbor of the fourth wheel, meshing with the intermediate pinion, substantially as set forth.

3. In a stop-watch, the combination of the oscillating and guided arbor of the quartersecond hand, a gear-wheel on said arbor, a transmitting pinion, a laterally oscillating bridge supporting said pinion, a centrallyperlorated set-screw to which the bridge is pivoted, a sleeve inelosing said set-screw and adjustable in a recess of the top bridge, and a gear-wheel on the arbor of the fourth wheel of the watch-movement, substantially as set forth.

4. In a stop-watch, the combination of the top bridge of the movement, having a guiderecess, a sleeve and setscrew adjustable in said recess, a bridge pivoted to said set-screw, and a pinion pivoted to an arbor of the bridge and adapted to adjust itself to the positions of the gear-wheels on the arbors of the fourth wheel and of the quarter-second hand, substantially as set forth.

5. In a stop -watch, the combination of the oscillating arbor of the quarter-second hand, a top bridge having an opening through which said arbor is passed, a recessed guide on said top bridge, and means for adjusting said guide so as to control the extent of oscillating motion of the arbor, substantially as set forth.

6. In a stop-watch, the combination of the oscillating arbor of the quartersecond hand, a top bridge having an opening through which said arbor is passed, a recessed and slotted guide on said top bridge, a set'screw for said guide, and a pivoted eccentric for adjusting said guide, substantially as set forth.-

7. In a stopwatch, the combination of the hollow oscillating arbor of the quarter-second hand, the arbor of the split quarter'second hand passing through said hollow arbor, a stop-disk on the arbor of the split quartersecond hand, a friction-brake arranged in line with the direction of oscillation of the arbor of the quarter-second hand, and mechanism for applying said brake to or removing it from said disk, substantially as set forth.

8. The combination of the hollow oscillating arbor of the quarter-second hand, the arbor of the split quarter second hand passing through said hollow arbor, a stop-disk on the arbor of the split quarter-second hand, a frietion-brake arranged to engage the stop-disk, a yokeshaped guide-piece for the brake, a spring for moving the brake toward the stopdisk, and a lever for removing the brake away from the disk, substantially as set forth.

9. The combination of the arbor of the auxiliary minute-hand, having a shoulder at one end, a s'upporting'plate having bearings for said arbor, mechanism for oscillating said arbor, a minutely-toothed gear-wheel keyed to said arbor, and an intermediate arbor having a gear-wheel meshing with the gear-wheel of the minute-arbor, and a pinion located below said gear-wheel and meshing with the centerwheelof the movement, substantially as set forth.

10. The combination of the oscillating and guided arbor of the auxiliary minute-hand passing through an opening of the top bridge, mechanism for oscillating the arbor, arecessed guide for the end of said arbor, and means for setting said guide so as to control the extent of oscillating motion of the minute-hand, sub stantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

HENRY A. LUGRIN.

, Witnesses:

PAUL Gonrnn, SIDNEY MANN.

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